Effects of Beetroot Juice Intake on Repeated Performance of Elite Swimmers. A Randomized Controlled Study
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 13
- 试验地点
- 2
- 主要终点
- Rate of Perceived Exertion
研究概览
简要总结
Objective: To investigate whether an acute intake of Beetroot Juice (BJ) improved performance factors in a repeated swimming effort at maximum speed in elite swimmers.
Methods: A total of 13 elite swimmers (6 girls and 7 boys) participated in this randomised, double-blind study. In 2 different trials, the swimmers ingested an injection of Beet-It (70 ml placebo (PL) or an injection of Beet-It 70 ml beetroot juice (BJ)) 3 hours before undergoing a 6x100m crawl intermittent maximal speed performance test.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Triple (Participant, Investigator, Outcomes Assessor)
盲法说明
Triple blinded (Participant, Investigator and Outcomes Assessor) The participant was blinded not knowing the treatment to which he was submitted, investigator and outcome assessor responsible for collecting the results, without commenting on the group from which the subject came.
入排标准
- 年龄范围
- 18 Years 至 25 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •national and international level swimmers
- •healthy swimmers
- •no breakfast
- •48 hours with restricted diet of: other sports supplements and beetroot-rich foods
排除标准
- •be on medication
- •having had breakfast
- •have brushed your teeth
结局指标
主要结局
Rate of Perceived Exertion
时间窗: 3 hours after ingestion of the beetroot juice
During the break between 100 and 100, they were asked how hard the effort had been using the subjective RPE scale as in other studies with BJ and swimming.
Total Time
时间窗: 3 hours after ingestion of the beetroot juice
The complete 6x100 main test was recorded with a JVC model GY-HM150E video camera placed on the stand of the facility itself at about 10 m from the start/turn wall (approximately 5 m above and 10 m from the swim lane) to record the entire session. The recording of the session made it possible to calculate the total times, with the program KINOVEA 0.9.5.
Lactate concentration
时间窗: 3 hours post-dose of Beetroot juice or Placebo
After the swimmers exited the water, their finger was wiped dry and their blood lactate concentration was measured with a portable Lactate Pro2 analyzer 1 minute after completing each 100-meter set.
Recovery Total Quality Scale
时间窗: 3 hours after ingestion of the beetroot juice
Just before these same swimmers performed the next 100, they were asked how recovered they felt, using another subjective TQR scale
Parcial Time
时间窗: 3 hours after ingestion of the beetroot juice
The complete 6x100 main test was recorded with a JVC model GY-HM150E video camera placed on the stand of the facility itself at about 10 m from the start/turn wall (approximately 5 m above and 10 m from the swim lane) to record the entire session. The recording of the session made it possible to calculate the split times, with the KINOVEA 0.9.5 program.
Counter Movement Jump
时间窗: 3 hours after ingestion of the beetroot juice
Swimmers completed three repetitions of CMJ with hands on waist using an infrared jumping system (Optojump Next, Microgate, Bolzano, Italy)
次要结局
- Stroke rate(from the day of randomization to the last day of the intervention: up to day 18)
- Underwater time(from the day of randomization to the last day of the intervention: up to day 18)
- Underwater distance(from the day of randomization to the last day of the intervention: up to day 18)
研究者
Berta Moreno Heredero
PhD Sudent
Universidad Francisco de Vitoria